*,:before,:after{box-sizing:border-box;margin:0;padding:0}:root{--blue-dark:#1e3a5f;--blue-mid:#2e6da4;--blue-light:#d6e4f0;--accent:#e8873a;--gray-100:#f5f7fa;--gray-200:#e8ecf0;--gray-400:#9ba8b5;--gray-700:#4a5568;--gray-900:#1a202c;--white:#fff;--green:#1a7a4a;--radius:6px;--shadow:0 1px 4px #0000001a;--header-h:64px;--sidebar-w:260px;--sidebar-collapsed-w:52px}body{color:var(--gray-900);background:var(--gray-100);font-family:-apple-system,BlinkMacSystemFont,Segoe UI,sans-serif;font-size:14px}.header{height:var(--header-h);background:var(--blue-dark);color:var(--white);z-index:100;justify-content:space-between;align-items:center;padding:0 24px;display:flex;position:sticky;top:0;box-shadow:0 2px 8px #0003}.header-brand{align-items:center;gap:12px;display:flex}.header-logo{object-fit:contain;border-radius:4px;width:36px;height:36px}.header-name{font-size:16px;font-weight:700}.header-nav{align-items:center;gap:4px;display:flex}.header-nav a{color:#ffffffbf;border-radius:var(--radius);padding:6px 14px;font-size:13px;font-weight:500;text-decoration:none;transition:background .15s,color .15s}.header-nav a:hover,.header-nav a.active{color:#fff;background:#ffffff1f}.header-user{color:#fffc;align-items:center;gap:10px;font-size:13px;display:flex}.header-user-info{flex-direction:column;align-items:flex-end;gap:1px;display:flex}.header-user-name{color:#ffffffe6;font-size:13px;font-weight:500}.header-user-email{color:#ffffff80;letter-spacing:.02em;font-family:monospace;font-size:11px}.header-admin-badge{color:#fff;letter-spacing:.05em;vertical-align:middle;background:#dc3545;border-radius:999px;margin-left:8px;padding:2px 8px;font-size:.65rem;font-weight:700}.header-supervisor-badge{color:#fff;letter-spacing:.05em;vertical-align:middle;background:#1a7a4a;border-radius:999px;margin-left:8px;padding:2px 8px;font-size:.65rem;font-weight:700}.app-layout{flex-direction:column;min-height:100vh;display:flex}.app-main{flex:1}.app-footer{text-align:center;color:var(--gray-400);border-top:1px solid var(--gray-200);background:var(--white);padding:16px 24px;font-size:12px}.container{max-width:1100px;margin:0 auto;padding:24px 16px}.card{background:var(--white);border-radius:var(--radius);border:1px solid var(--gray-200);box-shadow:var(--shadow)}.browser{grid-template-columns:var(--sidebar-w) 1fr;min-height:calc(100vh - var(--header-h) - 48px);gap:0;display:grid}.sidebar-tree{background:var(--white);border-right:1px solid var(--gray-200);padding:16px 0;overflow-y:auto}.tree-item{cursor:pointer;color:var(--gray-700);border-left:3px solid #0000;align-items:center;gap:8px;padding:7px 16px;font-size:13px;text-decoration:none;transition:background 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var(--blue-mid);background:#fff}.btn-ghost{color:var(--gray-700);border:1px solid var(--gray-200);background:0 0}.btn-success{background:var(--green);color:#fff}.btn-sm{padding:5px 10px;font-size:12px}.download-bar{background:var(--blue-dark);color:#fff;z-index:200;align-items:center;gap:16px;padding:12px 24px;display:flex;position:fixed;bottom:0;left:0;right:0}.progress-track{background:#fff3;border-radius:3px;flex:1;height:6px}.progress-fill{background:var(--accent);border-radius:3px;height:100%;transition:width .3s}.form-group{margin-bottom:16px}label{color:var(--gray-700);margin-bottom:4px;font-size:12px;font-weight:600;display:block}input,select,textarea{border:1px solid var(--gray-200);border-radius:var(--radius);background:var(--white);width:100%;color:var(--gray-900);padding:8px 10px;font-size:13px}input:focus,select:focus,textarea:focus{border-color:var(--blue-mid);outline:none;box-shadow:0 0 0 3px #2e6da426}textarea{resize:vertical;min-height:100px}.alert{border-radius:var(--radius);margin-bottom:16px;padding:12px 16px;font-size:13px}.alert-error{color:#721c24;background:#f8d7da;border:1px solid #f5c6cb}.alert-success{color:#155724;background:#d4edda;border:1px solid #c3e6cb}.alert-info{color:#0c5460;background:#d1ecf1;border:1px solid #bee5eb}.login-page{background:linear-gradient(135deg, var(--blue-dark) 0%, #2a5298 100%);justify-content:center;align-items:center;min-height:100vh;display:flex}.login-card{text-align:center;background:#fff;border-radius:10px;width:380px;padding:40px;box-shadow:0 16px 64px #0000004d}.login-logo{border-radius:8px;width:72px;height:72px;margin:0 auto 16px;display:block}.login-title{color:var(--blue-dark);margin-bottom:6px;font-size:22px;font-weight:700}.login-sub{color:var(--gray-400);margin-bottom:28px;font-size:13px;line-height:1.5}.empty-state{text-align:center;color:var(--gray-400);padding:48px 24px}.empty-icon{margin-bottom:12px;font-size:40px}.text-muted{color:var(--gray-400)}.text-sm{font-size:12px}.mt-16{margin-top:16px}.mt-24{margin-top:24px}.mb-16{margin-bottom:16px}.spinner{animation:1s linear infinite spin;display:inline-block}@keyframes spin{to{transform:rotate(360deg)}}.guide{max-width:720px;margin:0 auto}.guide h2{color:var(--blue-dark);border-bottom:2px solid var(--blue-light);margin:28px 0 10px;padding-bottom:6px;font-size:18px}.guide h3{color:var(--gray-700);margin:16px 0 6px;font-size:14px;font-weight:700}.guide p{color:var(--gray-700);margin-bottom:10px;line-height:1.7}.guide ol,.guide ul{color:var(--gray-700);margin-bottom:10px;padding-left:20px;line-height:1.8}.guide .tip{background:var(--blue-light);border-left:4px solid var(--blue-mid);border-radius:0 4px 4px 0;margin:12px 0;padding:10px 14px;font-size:13px}.browser.sidebar-collapsed{grid-template-columns:var(--sidebar-collapsed-w) 1fr}.sidebar-tree.collapsed{width:var(--sidebar-collapsed-w);padding:16px 0;overflow:hidden}.sidebar-tree.collapsed .tree-item>span:last-child{display:none}.sidebar-tree.collapsed .tree-item{justify-content:center;padding:8px 4px}.star-btn{cursor:pointer;color:var(--gray-400);background:0 0;border:none;flex-shrink:0;padding:2px 4px;font-size:16px;line-height:1;transition:color .15s,transform .1s}.star-btn:hover{color:var(--accent);transform:scale(1.2)}.star-btn.starred{color:var(--accent)}.tree-section-header{color:var(--blue-dark);cursor:default;text-transform:uppercase;letter-spacing:.06em;font-size:11px;font-weight:700}.sidebar-divider{background:var(--gray-200);height:1px;margin:8px 16px}.sidebar-star-btn{flex-shrink:0;padding:1px 3px;font-size:13px}.sidebar-tree.collapsed .sidebar-star-btn{display:none}